145615 has 4 divisors (see below), whose sum is σ = 174744. Its totient is φ = 116488.

The previous prime is 145603. The next prime is 145633. The reversal of 145615 is 516541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145615 - 2⁷ = 145487 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14557 + ... + 14566.

It is an arithmetic number, because the mean of its divisors is an integer number (43686).

2¹⁴⁵⁶¹⁵ is an apocalyptic number.

145615 is a deficient number, since it is larger than the sum of its proper divisors (29129).

145615 is an equidigital number, since it uses as much as digits as its factorization.

145615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29128.

The product of its digits is 600, while the sum is 22.

The square root of 145615 is about 381.5953354013. The cubic root of 145615 is about 52.6100488254.

The spelling of 145615 in words is "one hundred forty-five thousand, six hundred fifteen".